The TV series called Robert Powell: The Real Jesus Of Nazareth, focuses on what's described as Jesus' "lost years", including his time as a teenager and young man in Nazareth.
During an interview on the programme with Claire Pfann, an archaeologist from the University of the Holy Land, she said: "The word used in the gospel for inn can also mean guest room.
"It's not an inn, it's not a tavern, it's not a hotel. It might have been a 'basement cave' where you can store things."
Academics in the documentary have also claimed Jesus was a stonemason and not a carpenter.
Powell, who played the Son of God in the 1977 mini-series "Jesus of Nazareth", agreed with the theory as "It makes such sense".
He added: "We were standing in this house in Nazareth but there was no wood around it and therefore being a carpenter would be unlikely.
"What there was in abundance was stone.
"It's only tradition that has him as a carpenter."
